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= GREYSCALE 83/83 Plus =
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By Paul Marks


Version: 	0.1
Released:	11/25/99
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=In this file, you will find:=
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=Information on Developing Pictures=
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1.  Developing Pictures for the 83/83 Plus
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	There is a standardized header to go with any picture, it is as follows:

	.db "GPicV0.1",0		;This tells GPic 83/83+ that the following data is a picture file
	.db $09				;This is the length of the title in bytes (1 character = 1 byte) 
					;including the zero at the end
	.db "Test Pic",0		;This is the title of the picture
	.db $01				;This is the number of layers that the picture contains
						;If the picture has only one layer, then it can only 
						;have black and white
						;If the picture has two layers, then it can have 4
						;colors
						;If the picture has three layers, then it can have 8						
						;colors
	.db $0B				;This is the height of the picture, in pixels (B=11 [hex])
	.db $02				;This is the width of the picture in bytes (1 byte per 8 pixels) ie (16 pixels = 2 bytes), (24 = 3) ...
	.dw $0016			;This is the total size in bytes, also the height in pixels
					;times the width in bytes (height*(width/8)) (per layer!)

layer1:					;This label makes no difference at all to the program, it
					;just helps you sort out the layers while developing the
					;picture
	.db %00000001,%10000000
	.db %00000010,%01000000
	.db %00000010,%01000000
	.db %00000100,%00100000
	.db %00001000,%00010000
	.db %00001000,%00010000
	.db %00010000,%00001000
	.db %00100000,%00000100
	.db %00100000,%00000100
	.db %01000000,%00000010
	.db %11111111,%11111111
					;This file will display an image of a black and white 
					;triangle.  (0=off 1=on)
					;the numbers are in binary, so it is easier to "see" the 
					;picture
					;ie %00100000 - you can see which pixel will be on.  But the 
					;same thing in hex is $20
					;see how much easier binary is?
.end					;end of program

	This file would generate a black and white triangle with the name of Test Pic



So here is the standard header:

	.db "GPicV0.1",0	;required detection string
	.db $09			;title length
	.db "Test Pic",0	;title, zero-terminated
	.db $01			;number of layers
	.db $0B			;height
	.db $02			;width in bytes
	.dw $0016		;total size of 1 layer (height*(width in bytes)) (per layer)

Layer1:
	;DATA GOES HERE
Layer2:
	;OPTIONAL (DATA GOES HERE)
Layer3:
	;OPTIONAL (DATA GOES HERE)
.end				;End of File


Paul Marks
PMarks@employees.org
		Member of the Abolition Programming Alliance